diff --git a/test/misc/Makefile b/test/misc/Makefile
index 735f83065..f8832e77e 100644
--- a/test/misc/Makefile
+++ b/test/misc/Makefile
@@ -94,6 +94,12 @@ $(WORKDIR)/pptest2.$1.$2.prg: pptest2.c | $(WORKDIR)
 	$(if $(QUIET),echo misc/pptest2.$1.$2.prg)
 	$(NOT) $(CC65) -t sim$2 -$1 -o $$@ $$< $(NULLERR)
 
+# should compile, but gives an error
+$(WORKDIR)/bug1263.$1.$2.prg: pptest2.c | $(WORKDIR)
+	@echo "FIXME: " $$@ "currently does not compile."
+	$(if $(QUIET),echo misc/bug1263.$1.$2.prg)
+	$(NOT) $(CC65) -t sim$2 -$1 -o $$@ $$< $(NULLERR)
+
 # should compile, but then hangs in an endless loop
 $(WORKDIR)/endless.$1.$2.prg: endless.c | $(WORKDIR)
 	$(if $(QUIET),echo misc/endless.$1.$2.prg)
diff --git a/test/misc/bug1263.c b/test/misc/bug1263.c
new file mode 100644
index 000000000..457e64034
--- /dev/null
+++ b/test/misc/bug1263.c
@@ -0,0 +1,17 @@
+
+/* bug #1263 - erroneous error for implicit function declaration */
+
+#include <stdlib.h>
+
+enum E { I };
+extern int f(enum E);
+int f(e)
+  enum E e;
+{
+  return 1;
+}
+
+int main(void)
+{
+    return f(1) ? EXIT_SUCCESS : EXIT_FAILURE;
+}